<?php

/**
 * Created by PhpStorm.
 * User: anziguoer@sina.com
 * Date: 2015/4/29
 * Time: 12:36
 * link: http://www.ruanyifeng.com/blog/2014/05/restful_api.html [restful设计指南]
 */
/*** * * * * * * * * * * * * * * * * * * * * * * * * * ***\
 * 定义路由的请求方式                                    *
 *                                                       *
 * $url_model=0                                          *
 * 采用传统的URL参数模式                                 *
 * http://serverName/appName/?m=module&a=action&id=1     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * PATHINFO模式（默认模式）                              *
 * 设置url_model 为1                                     *
 * http://serverName/appName/module/action/id/1/         *
 ** * * * * * * * * * * * * * * * * * * * * * * * * * * **
*/
class restClient
{
    //请求的token
    const token='yangyulong';

    //请求url
    private $url;
    
    //请求的类型
    private $requestType;
    
    //请求的数据
    private $data;
    
    //curl实例
    private $curl;

    public $status;

    private $headers = array();
    /**
     * [__construct 构造方法, 初始化数据]
     * @param [type] $url         请求的服务器地址
     * @param [type] $requestType 发送请求的方法
     * @param [type] $data        发送的数据
     * @param integer $url_model   路由请求方式
     */
    public function __construct($url, $data = array(), $requestType = 'get') {
        
        //url是必须要传的,并且是符合PATHINFO模式的路径
        if (!$url) {
            return false;
        }
        $this->requestType = strtolower($requestType);
        $paramUrl = '';
        // PATHINFO模式
        if (!empty($data)) {
            foreach ($data as $key => $value) {
                $paramUrl.=  $key . '=' . $value.'&';
            }
            $url = $url .'?'. $paramUrl;
        }
        
        //初始化类中的数据
        $this->url = $url;
        
        $this->data = $data;
        try{
            if(!$this->curl = curl_init()){
                throw new Exception('curl初始化错误：');
            };
        }catch (Exception $e){
            echo '<pre>';
            print_r($e->getMessage());
            echo '</pre>';
        }

        curl_setopt($this->curl, CURLOPT_URL, $this->url);
        curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, 1);

    }
    
    /**
     * [_post 设置get请求的参数]
     * @return [type] [description]
     */
    public function _get() {

    }
    
    /**
     * [_post 设置post请求的参数]
     * post 新增资源
     * @return [type] [description]
     */
    public function _post() {

        curl_setopt($this->curl, CURLOPT_POST, 1);

        curl_setopt($this->curl, CURLOPT_POSTFIELDS, $this->data);
        
    }
    
    /**
     * [_put 设置put请求]
     * put 更新资源
     * @return [type] [description]
     */
    public function _put() {
        
        curl_setopt($this->curl, CURLOPT_CUSTOMREQUEST, 'PUT');
    }
    
    /**
     * [_delete 删除资源]
     * delete 删除资源
     * @return [type] [description]
     */
    public function _delete() {
        curl_setopt($this->curl, CURLOPT_CUSTOMREQUEST, 'DELETE');

    }
    
    /**
     * [doRequest 执行发送请求]
     * @return [type] [description]
     */
    public function doRequest() {
        //发送给服务端验证信息
        if((null !== self::token) && self::token){
            $this->headers = array(
                'Client_Token: '.self::token,
                'Client_Code: '.$this->setAuthorization()
            );
        }

        //发送头部信息
        $this->setHeader();

        //发送请求方式
        switch ($this->requestType) {
            case 'post':
                $this->_post();
                break;

            case 'put':
                $this->_put();
                break;

            case 'delete':
                $this->_delete();
                break;

            default:
                curl_setopt($this->curl, CURLOPT_HTTPGET, TRUE);
                break;
        }
        //执行curl请求
        $info = curl_exec($this->curl);

        //获取curl执行状态信息
        $this->status = $this->getInfo();
        return $info;
    }

    /**
     * 设置发送的头部信息
     */
    private function setHeader(){
        curl_setopt($this->curl, CURLOPT_HTTPHEADER, $this->headers);
    }

    /**
     * 生成授权码
     * @return string 授权码
     */
    private function setAuthorization(){
        $authorization = md5(substr(md5(self::token), 8, 24).self::token);
        return $authorization;
    }
    /**
     * 获取curl中的状态信息
     */
    public function getInfo(){
        return curl_getinfo($this->curl);
    }

    /**
     * 关闭curl连接
     */
    public function __destruct(){
        curl_close($this->curl);
    }
}
